Hand-modify a testcase (still PR21532)

Bot was still tripping [1] on a testcase the upgrade script didn't
handle in 224269.  This is still fallout from r224257.

[1]: http://lab.llvm.org:8011/builders/polly-amd64-linux/builds/25435

git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@224280 91177308-0d34-0410-b5e6-96231b3b80d8